If u(x) =x5 -x4+x2 and v(x) =-x 2 which expression is equivalent to (u/v) (x)

For this case we have the following functions:
 
 Dividing the functions we have:
 
 Substituting we have:
 
 Rewriting we have:
 
 
 
 An expression that is equivalent to (u/v) (x) is: